if you try to search for alternative coins to diversify your investment in crypo currency you have to analyze alternative coins carefully.  Based on some sources, these five coins can be your option: 

• Ethereum (ETH)

Ethereum almost has $200 billion market capitalization, the biggest market from all of alternative coins

• Binance Coin (BNB)

Binance Coin is issued by Binannce Exchange that is the biggest exchange platform, so it should has a good future

• XRP (XRP)

This coin has extremely low transaction fees and has $19 billion market capitalization. this coin is good option to invest in.

• Cardano (ADA)

This coin was an early adopter the mechanism of PoS (Proof of Stake), many feature that attracts many people to use it or hold it, example Cardano speeds up the transaction.

• Dogecoin (DOGE)

This has about $10.6 billion market cap
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Alternative coins which has huge market cap and good feature is a promising invesment.